G'day Whitey,
I asked the same question when I needed a mechanic up there, and Bill put me onto GT Automotive (Gary Tenni) who is based at 10 Ernest St, Redlynch (0740552526). We were quite happy with what was done and would use them again. They have a good lounge to wait in as well, which is fortunate as there is not much around that we found.
Barrabart also suggested Wayne Boylett on Scott St. 074041 6377.
We used Gary as it was more convenient.